app/controllers/registrations_controller.rb
class RegistrationsController < Devise::RegistrationsController
# Here is the right place to notify yourself if you'd like
after_filter({:only => :create}) do
end
def destroy
if current_user.recurly_enabled
BillingService.close_account(current_user.recurly_account_code)
end
# Here you can send the user a specific email
# You could also send you the reason entered by the user
# + LTV + activity before cancellation
super
end
end